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        <h1 class="page_title">桌面通知</h1>
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          <h2>内容</h2>
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            <li>
              <a href=#example>例子</a>
            </li>
            <li>
              <a href=#reference>API参考</a>
            </li>
            <li>
              <a href=#communication>与其它视图通信</a>
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            <li>
              <a href=#examples>更多例子</a>
            </li>
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<p>
使用桌面通知来告诉用户发生了一些重要的事。通知出现在浏览器窗口的外面，如下面的截图所示，通知显示方式与位置的具体细节取决于具体平台。
</p>

<img src="stable/static/images/notification-windows.png"
  width="28%" style="margin:2em 0.5em 1em; border:1px solid black;"
  alt="Notifications on Microsoft Windows"/>
<img src="stable/static/images/notification-mac.png"
  width="28%" style="margin:2em 0.5em 1em; border:1px solid black;"
  alt="Notifications on Mac OS X"/>
<img src="stable/static/images/notification-linux.png"
  width="28%" style="margin:2em 0.5em 1em; border:1px solid black;"
  alt="Notifications on Ubuntu Linux"/>

<p>
您可利用一点点JavaScript代码以及可选的一个与您的扩展程序一起打包的HTML页面创建通知窗口。
</p>


<h2 id="example">例子</h2>

<p>首先在您的清单文件中声明"<code>notifications</code>"权限:</p>
<pre>
{
  "name": "我的扩展程序",
  "manifest_version": 2,
  ...
<b>  "permissions": [
    "notifications"
  ]</b>,
  ...
  // <strong>注意：</strong> 由于<a href="http://code.google.com/p/chromium/issues/detail?id=134315">bug 134315</a>, 您必须将您希望与createNotification()
  // 一起使用的所有图片声明为可以在网页中访问的资源。
<b>  "web_accessible_resources": [
    "48.png"
  ]</b>,
}
</pre>

<p>然后，使用<code>webkitNotifications</code>对象创建通知：</p>

<pre>
// <strong>注意:</strong> 没有必要调用 webkitNotifications.checkPermission().
// 声明<em>notifications</em>权限的扩展程序总是允许创建通知。

// 创建一个简单的文本通知：
var notification = webkitNotifications.createNotification(
  '48.png',  // 图标URL，可以是相对路径
  'Hello!',  // 通知标题
  'Lorem ipsum...'  // 通知正文文本
);

// 或者创建HTML通知：
var notification = webkitNotifications.createHTMLNotification(
  'notification.html'  //  HTML的URL，可以是相对路径
);

// 然后显示通知。
notification.show();
</pre>

<h2 id="reference">API参考</h2>

<p>参见<a href="http://dev.chromium.org/developers/design-documents/desktop-notifications/api-specification">桌面通知规范草案（英文）</a>.</p>


<h2 id="communication">与其它视图通信</h2>

<p>
您可以使用
<a href="extension.html#method-getBackgroundPage">getBackgroundPage()</a>和
<a href="extension.html#method-getViews">getViews()</a>来实现您扩展程序中的通知与其它视图间的通信。例如：
</p>

<pre>
// 在一个通知中...
chrome.extension.getBackgroundPage().doThing();

// 来自后台页面...
chrome.extension.getViews({type:"notification"}).forEach(function(win) {
  win.doOtherThing();
});
</pre>


<h2 id="examples">更多例子</h2>

<p>
您可以在
<a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/notifications/">examples/api/notifications</a>
目录中找到一个使用通知的简单例子。有关其它例子以及查看源代码的帮助，请参见
<a href="samples.html">示例</a>。
</p>

<p>
另外，您也可以参见html5rocks.com（英文）上的
<a href="http://www.html5rocks.com/tutorials/notifications/quick/">通知教程</a>。
。请忽略与权限有关的代码，如果您声明了"notifications"（通知）权限它们就没有必要了。
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